Self-lubricating bush assembly

Patent metadata

Field	Value
Publication number	US-11293495-B2
Application number	US-202016898878-A
Country	US
Kind code	B2
Filing date	Jun 11, 2020
Priority date	Jun 14, 2019
Publication date	Apr 5, 2022
Grant date	Apr 5, 2022

Abstract

A bush assembly configured to be disposed between a first component and a second component movably coupled to the first component, the bush assembly comprising a first bush portion comprising a self-lubricating material; and a second bush portion, the second bush portion having greater electrical conductivity than the first bush portion, wherein the second bush portion provides a conductive path between the first component and the second component.

First claim

The invention claimed is:

1. A bush assembly configured to be disposed between a first component and a second component movably coupled to the first component, the bush assembly comprising:
a first bush portion comprising a self-lubricating material; and
a second bush portion, the second bush portion having greater electrical conductivity than the first bush portion, wherein the second bush portion provides a conductive path between the first component and the second component, and the second bush portion is removable from the first bush portion, and wherein a cross-sectional shape of the second bush provides for elastic deformation.

2. The bush assembly according to claim 1 , wherein the second bush portion comprises any of an electrically conductive elastomer, graphite, or a metallic material.

3. The bush assembly according to claim 1 , further comprising
a third bush portion comprising the self-lubricating material, wherein the second bush portion is located between the first bush portion and third bush portion.

4. The bush assembly according to claim 3 , wherein the second bush portion is configured to exert a force on at least one of the first bush portion and the third bush portion.

5. The bush assembly according to claim 1 further comprising at least one flange attached to at least one of the first bush portion and the second bush portion.

6. The bush assembly according to claim 1 , wherein the second bush portion is configured to exert a force on at least one of the first component and the second component.

7. The bush assembly according to claim 6 , wherein the second bush portion is assembled in the bush assembly in a compressed state to thereby generate the force.

8. The bush assembly according to claim 1 , wherein the first bush portion and the second bush portion each has a respective inner surface in contact with the first component, and a respective outer surface in contact with the second component.

9. A joint assembly comprising:
a first component;
a second component movably coupled to the first component; and
a bush assembly disposed between the first component and the second component, the bush assembly comprising:
a first bush portion comprising a self-lubricating material; and
a second bush portion, the second bush portion having greater electrical conductivity than the first bush portion, wherein the second bush portion provides a conductive path between the first component and the second component, the second bush portion is removable from the first bush portion, and wherein a cross-sectional shape of the second bush provides for elastic deformation.

10. The joint assembly according to claim 9 , wherein the first component is a joint pin and the second component is pivotally coupled to the joint pin.

11. The joint assembly according to claim 9 , wherein the first component is a shaft, the shaft being coupled to the second component so that the shaft can move relative to the second component along a longitudinal axis of the shaft.

12. An aircraft landing gear assembly comprising one or more joint assemblies according to claim 9 .

13. An aircraft comprising one or more aircraft landing gear assemblies according to claim 12 .

Assignees

• Safran Landing Systems Uk Ltd

Inventors

• Haikney Daniel
• Price Neil

Classifications

• F16C33/16

  Sliding surface consisting mainly of graphite · CPC title

• F16C33/04

  Brasses; Bushes; Linings · CPC title

• B64D45/02

  Lightning protectors; Static dischargers · CPC title

• B64C25/10

  retractable, foldable, or the like · CPC title

• F16N15/00

  Lubrication with substances other than oil or grease; Lubrication characterised by the use of particular lubricants in particular apparatus or conditions (F16N17/00 takes precedence; lubricating compositions, selection of particular substances as lubricants in general C10M) · CPC title